High voltage switch

Abstract

A high voltage switch including a rotatable insulating column adjusted by means of an operating arm assembly including two bolt circles of equal radius and unequal spacing.

We claim: 
     
       1. A high-voltage switch comprising: a. separable contact means;   b. rotatable insulating means supporting said separable contact means, rotation of said rotatable insulating means producing separation of said contact means;   c. energizable drive means;   d. linkage means connected to said drive means for rotating said rotatable insulator means; and   e. an arm assembly, said arm assembly comprising an operating arm connected to said linkage means, said operating arm having a first series of holes equally spaced about a first circle, said arm assembly comprising a flange member attached to said rotatable insulating means and having a second series of holes equally spaced about a second circle of radius substantially equal to said first circle, the spacing of said first series of holes being unequal to the spacing of said second series of holes, said operating arm being attached to said flange member and so positioned that the centers of said first circle and said second circle are in axial alignment and at least two of said first series of holes are in axial alignment with at least two of said second series of holes to form at least two pairs of aligned holes symmetrically disposed about said circles, said arm assembly also comprising a plurality of means for securing said operating arm in fixed relationship to said flange member, each of said securing means extending through both holes of an aligned hole pair;   f. energization of said drive means producing movement of said linkage means to cause rotation of said rotatable insulating means and operation of said separable contact means, said symmetrical disposition of said aligned hole pairs about said circles causing rotational loads produced by energization of said drive means to be symmetrically imposed upon said flange member.   
     
     
       2. A high voltage switch as claimed in claim 1 wherein said first series of holes is asymmetrically disposed about said first circle with respect to a line connecting the center of said first circle with the point of connection between said linkage means and said operating arm. 
     
     
       3. A high voltage switch as claimed in claim 1 wherein said first series of holes contains 18 holes equally spaced around said first circle and said second series of holes contains 15 holes equally spaced around said second circle. 
     
     
       4. A multiphase high-voltage switch comprising: a. separable contact means:   b. rotatable insulating means supporting said separable contact means, rotation of sair rotatable insulator means producing separation of said contact means;   c. drive means for rotating said rotatable insulating means;   d. linkage means connected to said drive means; and   e. an arm assembly, said arm assembly comprising an operating arm connected to said linkage means, said operating arm having a first series of holes equally spaced about a first circle, said arm assembly also comprising a synchronizing arm attached to said rotatable insulator means and having a second series of holes equally spaced about a second circle of radius substantially equal to said first circle, the spacing of said first series of holes being unequal to the spacing of said second series of holes, said operating arm being attached to said synchronizing arm and so positioned that the centers of said first circle and said second circle are in axial alignment and at least two of said first series of holes are in axial alignment with at least two of said second series of holes to form at least two pairs of axially aligned holes symmetrically disposed about said circles, said arm assembly also comprising a plurality of means for securing said operating arm in fixed relationship to said synchronizing arm, each of said securing means extending through both holes of an aligned hole pair;   f. energization of said drive means producing rotation of said rotatable insulating means and operation of said separable contact means, said symmetrical disposition of said aligned hole pairs about said circles causing rotational loads produced by energization of said drive means to be symmetrically imposed upon said synchronizing arm.   
     
     
       5. An arm assembly for producing rotational motion in a multiphase high-voltage switch comprising an operating arm having a first series of holes equally spaced about a first circle, and a synchronizing arm having a second series of holes equally spaced about a second circle of radius substantially equal to the radius of said first circle, the spacing of said first series of holes being unequal to the spacing of said second series of holes, said operating arm being attached to said synchronizing arm and so positioned that the centers of said first and second circles are in axial alignment and at least two of said first series of holes are in axial alignment with at least two of said second series of holes to form at least two pairs of axially aligned holes symmetrically disposed about said circles, said arm assembly also comprising a plurality of means for securing said operating arm in fixed relationship to said synchronizing arm, each of said securing means extending through both holes of an aligned hole pair, said symmetrical disposition of aligned hole pairs about said circles resulting in symmetrical imposition of rotational loads upon said operating arm and said synchronizing arm when force is transmitted through said arm assembly. 
     
     
       6. An arm assembly as recited in claim 5 wherein said first series of holes contains 18 holes equally spaced around said first circle and said second series of holes contains 15 holes equally spaced around said second circle, thereby forming three pairs of aligned holes symmetrically spaced at 120° intervals about said circles.